Congressional proponents of oil and gas drilling are pointing to Cuba's exploration off the coast of Florida -- with help from China -- as a prime reason to open up U.S. drilling in the eastern Gulf of Mexico. But Florida legislators continue to resist, and some of them are trying to stop Cuba's activities by pushing to rescind a 1977 treaty dividing the Straits of Florida halfway between the two countries. The Bush administration, with an eye toward the pivotal role Florida has played in presidential politics and out of solidarity with President Bush's brother, Florida Gov. Jeb Bush, has...